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PP breathing valve

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PP breathing valve is mainly used in atmospheric and low pressure storage tanks (such as HCL / HNO3 storage tanks) that contain certain volatile chemical substances that are not allowed to leak. It is fixed on the top of the storage tank as a ventilation device. In order to ensure that the pressure in the tank is in a normal state, the storage tank is prevented from being damaged by the occurrence of positive and negative pressure in the tank, and the volatilization loss of the liquid in the tank can be reduced. Plastic breathing valve is a ventilation device installed on a fixed roof storage tank, which can reduce oil evaporation loss and control the pressure balance of the storage tank.

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PP breathing valve

       It is mainly used in atmospheric and low pressure storage tanks (such as HCL / HNO3 storage tanks) that contain certain volatile chemical substances that are not allowed to leak. It is fixed on the top of the storage tank as a ventilation device to ensure the tank. The internal pressure is in a normal state, which prevents the storage tank from being damaged due to the generation of positive and negative pressure in the tank, and it can also reduce the volatilization loss of the liquid in the tank. Plastic breathing valve is a ventilation device installed on a fixed roof storage tank, which can reduce oil evaporation loss and control the pressure balance of the storage tank. According to the national standard "Code for Design of Fire Protection for Petrochemical Enterprises" (GB50160-92): "Fixed top tanks for Class A and B liquids shall be provided with flame arresters and breathing valves."

Installation and maintenance of PP breathing valve:
1. The breathing valve is installed at the highest point of the storage tank, in order to reduce the evaporation loss of the material and maintain the air pressure balance inside and outside the storage tank. For general vertical oil tanks, the fire-resistance breathing valve is installed in the center of the tank top plate; for storage tanks that need to be insulated on the tank top, the fire-resistance breathing valve can be installed near the ladder platform.
2. Do not place it horizontally or upside down. If two fire-blocking breathing valves need to be installed on the top of the storage tank, the fire-blocking breathing valves and the center of the tank top should be installed symmetrically.
3. It is generally used for 1-3 months when installed on a storage tank. It is necessary to periodically check whether the positive and negative pressure valve discs of the breathing valve work flexibly. When the breathing valve is working normally, it will emit a "hiss-hiss-hiss" pressure relief sound Otherwise, you need to open the valve cover on the top of the breathing valve and check whether the valve plate of the breathing valve has a "chuck" phenomenon. Whether there is dirt on the guide rod. If there is any dirt in time, ensure that the guide rod can run freely. There is no wear on the sealing surface of the valve seat. If it is worn, it should be replaced immediately to ensure the normal and safe operation of the breathing valve.
4. The positive and negative pressure valve discs of the breathing valve are continuously changed according to the rise and fall of the pressure in the tank, and move up and down. After the fire-resistance breathing valve is used for three years, generally the valve disc, guide rod and sealing surface of the fire-resistance breathing valve need to be replaced to ensure the normal operation of the fire-resistance breathing valve and maintain the safe operation of the storage tank.

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Beijing Jingchen Times Petrochemical Equipment Co., Ltd. specializes in providing PP breathing valves and other information. Welcome to inquire!
地址:北京市朝阳区立清路7号 Total visits: 92631 Address: No. 7 Liqing Road, Chaoyang District, Beijing
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